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Deepak Rock
@deepak-rock
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Joined: Aug 6, 2021
Last seen: Sep 10, 2021
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Topics: 1742 / Replies: 303
AllTopicsReplies
Topic
Why does an aqueous solution of an acid conduct electricity?
5 years ago
Forum
Acids, bases and salt
Replies: 0
Views: 79
Topic
Aqueous solutions of HCl, HNO3 and H2SO4, etc. show acidic character while those of the compounds like ethyl alcohol (C2H5OH) and glucose (C6H12O6) fail to do so.
5 years ago
Forum
Acids, bases and salt
Replies: 0
Views: 333
Topic
A metallic compound A’ reacts with dilute hydrochloric acid to produce effervescence. The gas evolved extinguishes a burning candle.
5 years ago
Forum
Acids, bases and salt
Replies: 0
Views: 304
Topic
Which gas is usually liberated when an acid reacts with a metal? Illustrate with an example. How will you test for the presence of this gas?
5 years ago
Forum
Acids, bases and salt
Replies: 0
Views: 109
Topic
Why should curd and other sour substances not be kept in containers made up of brass or copper?
5 years ago
Forum
Acids, bases and salt
Replies: 0
Views: 412
Topic
You have been provided with three test tubes. One of them contains distilled water and the other two contain an acidic solution and a basic solution, respectively.
5 years ago
Forum
Acids, bases and salt
Replies: 0
Views: 262
Topic
Explain the following terms with one example of each. (a) Corrosion (b) Rusting
5 years ago
Forum
Chemical Reactions and Equations
Replies: 0
Views: 388
Topic
Oil and fat containing food items are flushed with nitrogen. Why?
5 years ago
Forum
Chemical Reactions and Equations
Replies: 0
Views: 444
Topic
Why do you apply paint on iron articles?
5 years ago
Forum
Chemical Reactions and Equations
Replies: 0
Views: 165
Topic
A shining brown-coloured element ‘X’ on heating in air becomes black in colour. Name the element ‘X’ and the black-coloured compound formed.
5 years ago
Forum
Chemical Reactions and Equations
Replies: 0
Views: 174
Topic
Explain the following in terms of gain or loss of oxygen with two examples of each: (a) oxidation (b) reduction
5 years ago
Forum
Chemical Reactions and Equations
Replies: 0
Views: 489
Topic
What do you mean by precipitation reaction? Explain giving examples.
5 years ago
Forum
Chemical Reactions and Equations
Replies: 0
Views: 338
Topic
In the refining of silver, the recovery of silver from silver nitrafe solution involved displacement by copper metal. Write down the reactions involved.
5 years ago
Forum
Chemical Reactions and Equations
Replies: 0
Views: 156
Topic
What is the difference between displacement and double displacement reactions? Write equations for these reactions.
5 years ago
Forum
Chemical Reactions and Equations
Replies: 0
Views: 432
Topic
Write one equation each for decomposition reaction where energy is supplied in the form of heat, light and electricity.
5 years ago
Forum
Chemical Reactions and Equations
Replies: 0
Views: 225
Topic
Why are decomposition reactions called the opposite of combination reactions? Write equations for these reactions.
5 years ago
Forum
Chemical Reactions and Equations
Replies: 0
Views: 261
Topic
Why is respiration considered an exothermic reaction?
5 years ago
Forum
Chemical Reactions and Equations
Replies: 0
Views: 284
Topic
What does one mean by exothermic and endothermic reactions? Give examples.
5 years ago
Forum
Chemical Reactions and Equations
Replies: 0
Views: 243
Topic
Write the balanced chemical equations for the following reactions and identify the type of reaction: (a) Potassium bromide(aq) + Barium iodide(aq) ➝ Potassium iodide(aq) + Barium bromide(aq)
5 years ago
Forum
Chemical Reactions and Equations
Replies: 0
Views: 156
Topic
Write the balanced equations for the following reactions: (a) Calcium hydroxide + Carbon dioxide ➝ Calcium carbonate + Water
5 years ago
Forum
Chemical Reactions and Equations
Replies: 0
Views: 156
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